Trajectory Optimization for UAV-Aided IoT Secure Communication Against Multiple Eavesdroppers

Lingfeng Shen, Jiangtao Nie, Ming Li, Guanghui Wang, Qiankun Zhang and Xin He ()
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Lingfeng Shen: School of Software, Henan University, Kaifeng 475004, China
Jiangtao Nie: School of Software, Henan University, Kaifeng 475004, China
Ming Li: School of Software, Henan University, Kaifeng 475004, China
Guanghui Wang: School of Software, Henan University, Kaifeng 475004, China
Qiankun Zhang: China Information Technology Designing and Consulting Institute Co., Ltd., Beijing 100048, China
Xin He: School of Software, Henan University, Kaifeng 475004, China

Future Internet, 2025, vol. 17, issue 5, 1-13

Abstract: This study concentrates on physical layer security (PLS) in UAV-aided Internet of Things (IoT) networks and proposes an innovative approach to enhance security by optimizing the trajectory of unmanned aerial vehicles (UAVs). In an IoT system with multiple eavesdroppers, formulating the optimal UAV trajectory poses a non-convex and non-differentiable optimization challenge. The paper utilizes the successive convex approximation (SCA) method in conjunction with hypograph theory to address this challenge. First, a set of trajectory increment variables is introduced to replace the original UAV trajectory coordinates, thereby converting the original non-convex problem into a sequence of convex subproblems. Subsequently, hypograph theory is employed to convert these non-differentiable subproblems into standard convex forms, which can be solved using the CVX toolbox. Simulation results demonstrate the UAV’s trajectory fluctuations under different parameters, affirming that trajectory optimization significantly improves PLS performance in IoT systems.

Keywords: Internet of Things (IoT); physical layer security; unmanned aerial vehicle (UAV); trajectory optimization (search for similar items in EconPapers)
JEL-codes: O3 (search for similar items in EconPapers)
Date: 2025
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